Posted by Sherry on .
Twenty randomly selected students took the statistics final. If the sample mean was 88 and the ó =5.2, construct a 95% confidence interval for the mean score of the students.

Stats 
MathGuru,
Formula:
CI95 = mean ± 1.96(sd/√n)
With your data:
CI95 = 88 ± 1.96(5.2/√20)
Calculate for the interval.